Evensberget, D. and Carter, B. D. 
ORCID: https://orcid.org/0000-0003-0035-8769 and Marsden, S. C. ORCID: https://orcid.org/0000-0001-5522-8887 and Brookshaw, L. and Folsom, C. P. and Salmeron, R.
(2022)
The winds of young Solar-type stars in Coma Berenices and Hercules-Lyra.
Monthly Notices of the Royal Astronomical Society, 510 (4).
pp. 5226-5245.
ISSN 0035-8711
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Abstract
We present wind models of 10 young Solar-type stars in the Hercules-Lyra association and the Coma Berenices cluster aged around ∼0.26 and ∼0.58 Gyr, respectively. Combined with five previously modelled stars in the Hyades cluster, aged ∼0.63 Gyr, we obtain a large atlas of 15 observationally based wind models. We find varied geometries, multi-armed structures in the equatorial plane, and a greater spread in quantities such as the angular momentum loss. In our models, we infer variation of a factor of ∼6 in wind angular momentum loss J˙ and a factor of ∼2 in wind mass-loss M˙ based on magnetic field geometry differences when adjusting for the unsigned surface magnetic flux. We observe a large variation factor of ∼4 in wind pressure for an Earth-like planet; we attribute this to variations in the ‘magnetic inclination’ of the magnetic dipole axis with respect to the stellar axis of rotation. Within our models, we observe a tight correlation between unsigned open magnetic flux and angular momentum loss. To account for possible underreporting of the observed magnetic field strength we investigate a second series of wind models where the magnetic field has been scaled by a factor of 5. This gives M˙∝B0.4 and J˙∝B1.0 as a result of pure magnetic scaling.
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| Item Type: | Article (Commonwealth Reporting Category C) |
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| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | File reproduced in accordance with the copyright policy of the publisher. |
| Faculty/School / Institute/Centre: | Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -) |
| Faculty/School / Institute/Centre: | Current – Faculty of Health, Engineering and Sciences - School of Mathematics, Physics and Computing (1 Jan 2022 -) |
| Date Deposited: | 14 Apr 2022 03:48 |
| Last Modified: | 14 Apr 2022 03:48 |
| Uncontrolled Keywords: | stars: magnetic field; stars: rotation; stars: solar-type; stars: winds; Sun: evolution; Sun: heliosphere |
| Fields of Research (2020): | 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems |
| Socio-Economic Objectives (2020): | 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences |
| Identification Number or DOI: | https://doi.org/10.1093/mnras/stab3557 |
| URI: | http://eprints.usq.edu.au/id/eprint/47816 |
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